as far as i know the hebrew did not replace the original inhabitants of plaestine and lebanon, the hebrew own the war at ain jalut and the rest of the cananet population kept living there and by time they became christians then became muslims after the islamic conquests,
the arab thing happened later when one of the Umayyads Caliph made arabic as the official languge of the Caliphate.
so basicly most of the non-arab became arabised more than 1000 years ago.
in some places in syria people kept speaking their original language which is Aramaic. a sister language of Arabic and hebrew.
other languges iam not sure if they are still there or not.
i dont remember we had any topic about Canaanites.
but the below thread is about arabic language becomming official language of the empire.
http://www.allempires.com/forum/forum_posts.asp?TID=10931&am p;PN=1
and this one is about ancient Arabs and their distributiion before islam.
http://www.allempires.com/forum/forum_posts.asp?TID=11251&am p;PN=1